1. I uploaded last year's exams' solution. I also updated 2014B solution, there was a mistake in the previous solution, in 2.2.b.
2. I uploaded two student solutions for HW4. As before, it's not thoroughly checked so there might be errors. I might upload more soon. Note that some of the questions (kernel PCA and AdaBoost) appeared in last year's exam, so there is a formal solution there. Many thanks for the students who agreed!
3. HW5 had a mistake in Q2 (p and p-hat were reversed). Uploaded a new version with that correction.
4. There is no official scribe for the last recitation. I uploaded a student summary (thanks!) - if someone wants to send me another one, it'll be nice.